Dr. Ben Carson stepped into the national spotlight recently when, as speaker at the National Prayer Breakfast, to an audience that included President Obama, he was openly critical of the President's approach to health care and his overall management of the nation's economy.

Carson, who is director of pediatric neurosurgery at Johns Hopkins Hospital, is a hero to many. His life story, rising from a Detroit ghetto to a life of accomplishment and distinction, is a story of American ideals on steroids.

Those ideals say that America is about merit not circumstance. Your life, your achievements are the result of what you do and how you live, not where you came from.

The hard history of blacks in America has always made it a challenge for them to accept this credo. Many still carry a sense that those ideals may be true for whites, but they never were true, and still aren't true, for blacks.

So in this context, Ben Carson's story is particularly important. It's making liberals nervous, and the attacks on him are starting.

He's now pulled out, under pressure, from giving the commencement address at Johns Hopkins University because some are unhappy with how, in an interview on Fox, he expressed his views regarding the importance of maintaining the integrity of traditional marriage.

Blacks have known about Carson for years. I gave his book "Gifted Hands" to my daughters to read when they were little girls. A highly acclaimed made-for-TV movie about his life aired in 2009, with Dr. Carson played by Oscar-winning actor Cuba Gooding, Jr.

But this story of personal responsibility, hard work and traditional values is becoming a political story. It is becoming political because Ben Carson's American dream story, according to the liberal script, is not supposed to work for blacks.

Ben Carson is the biggest threat to liberals since Bill Cosby got out of line at an NAACP banquet in Washington, DC in 2004.

Cosby had the temerity to deliver tough, critical talk about what too many blacks are doing with the freedom that civil rights activists of the 1960's fought to achieve. He contrasted the sixties generation with the new generation of black youth sitting in jail. "…..these are not political criminals. These are people going around stealing Coca Cola. People getting shot in the back of the head over a piece of pound cake."

Cosby attributed the chaos to breakdown in values, family, and personal responsibility. It's the last thing the NAACP crowd wanted to hear that night and he paid a price. He was vilified and marginalized until he backed off.

Liberals never take on what black conservatives actually say because they can't. So the attacks become personal.

Trillions of taxpayers' dollars have been poured into black communities over the last half-century producing virtually no change in the incidence of black poverty.

Yet, Ben Carson, through diligence and traditional values, achieved on his own what those trillions of dollars of government programs were supposed to deliver.

Liberal black writer Ta-Nehisi Coates put the cards on the table in an article about Cosby, which appeared in 2008 in the The Atlantic magazine. The typical black conservative votes for Democrats, he notes, "not out of love for abortion rights.... but because he feels…. that the modern day GOP draws on support of people who hate him."

So stoking paranoia about racism has always been the strategy of liberals to fend off the political threat of conservative values that so many church-going blacks embrace.

Predictably, Coates has produced a NY Times column on Carson, reducing this great man to the usual caricature of a black empty suit manipulated by white conservatives.

Ben Carson is an accomplished and wealthy man. Americans, certainly black Americans, need him in public life more than he needs to be in public life. Let's hope the left wing and the haters of traditional morality don't succeed in making him conclude it's not worth it.

Star Parker is an author and president of CURE, Center for Urban Renewal and Education. Contact her at www.urbancure.org